The injection should be fractionated, with gentle aspiration every 2-3 cc, and not injected in whole non-stop. The syringe/cannula should be supported from below, rather than from above as shown in the video, so the supporting hand does not block view of a possible SQ injection. The lack of blood aspirate is not a guarantee that intravascular injection is occurring. Addition of epinephrine 1:200,000 has been shown to be an effective means of detecting intravascular injection by observing ECG changes or changes in HR/BP.